Ultrasonic generator



FIG. 1 is a top view of an ultrasonic generator;

FIG. 2 is a bottom view thereof;

FIG. 3 is a left-side view thereof;

FIG. 4 is a right-side view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a front view thereof; and,

FIG. 7 is a perspective view thereof. 

CLAIM The ornamental design for an ultrasonic generator, as shown and described. 